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WO2010017280A1 - Système de mélange - Google Patents

Système de mélange Download PDF

Info

Publication number
WO2010017280A1
WO2010017280A1 PCT/US2009/052824 US2009052824W WO2010017280A1 WO 2010017280 A1 WO2010017280 A1 WO 2010017280A1 US 2009052824 W US2009052824 W US 2009052824W WO 2010017280 A1 WO2010017280 A1 WO 2010017280A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
blending system
arrangement
measuring device
mixed
Prior art date
Application number
PCT/US2009/052824
Other languages
English (en)
Inventor
David M. Kemp
Original Assignee
Techni-Blend, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Techni-Blend, Inc. filed Critical Techni-Blend, Inc.
Publication of WO2010017280A1 publication Critical patent/WO2010017280A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D11/00—Control of flow ratio
    • G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
    • G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
    • G05D11/135—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by sensing at least one property of the mixture
    • G05D11/137—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by sensing at least one property of the mixture by sensing the density of the mixture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/236—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids specially adapted for aerating or carbonating beverages
    • B01F23/2363—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23762—Carbon dioxide
    • B01F23/237621—Carbon dioxide in beverages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/49—Mixing systems, i.e. flow charts or diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/833—Flow control by valves, e.g. opening intermittently
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions

Definitions

  • This invention relates generally to liquid blending and, more particularly, to a liquid blending system that provides precisely controlled dispensing of the liquid components to attain a blended liquid having desired characteristics.
  • fluid blending systems such as are used in the food and beverage industry
  • the ratio of the final, blended product is then tested in an out-of-line sampling process at a location far downstream of the location at which the blending operation takes place. While a system such as this is functional, it is subject to error and waste. For example, if the ratio of the final, blended product is outside of specifications, this will not be discovered until a significant amount of blended product has been produced, and all of the out-of- specification product must then be discarded.
  • conventional blending systems especially those used to blend syrup and water, typically have a storage tank that holds chilled carbonated mixed fluid for subsequent delivery to a filler system that fills individual containers with the mixed fluid.
  • the addition of the storage tank greatly increases the overall size of the blending system and the storage tank must be regularly cleaned.
  • a blending system setup without such a holding tank would be advantageously smaller, would reduce product inventory and would require less sanitation time.
  • the present invention involves the use of dispensing equipment that can carefully and precisely control dispensing of the liquid components, in combination with a flow meter that ascertains certain characteristics of the blended product immediately after the liquid components are blended together.
  • the invention is incorporated into a holding tank-less blending system used to mix syrup and water.
  • a blending system in accordance with one aspect of the invention, includes a first liquid supply arrangement for providing a first liquid component, a second liquid supply arrangement for providing a second liquid component, a mixing arrangement for mixing the first and the second liquid components to form a blending liquid, and a mass flow measuring device for determining the mass flow of the blended liquid at a location downstream of the mixing arrangement.
  • the blending system further includes a control arrangement for controlling the first and the second liquid supply arrangements in response to the mass flow measuring device.
  • a blending system in accordance with another aspect of the invention, includes a first liquid supply arrangement for providing a first liquid component, a first volumetric flow determining device for determining the volumetric flow of the first liquid component, a second liquid supply arrangement for providing a second liquid component, and a second volumetric flow determining device for determining the volumetric flow of the second liquid component.
  • the blending system further includes a mixing arrangement for mixing the first and the second liquid components, a density measuring device for measuring the density of the mixed liquid at a location downstream of the mixing arrangement, and a control arrangement for controlling the first and the second liquid supply arrangements in response to the density measuring device.
  • a blending system having first and second liquid supply arrangements that provide first and second liquid components, respectively.
  • the blending system also has mixing arrangement for mixing the first and the second liquid components to form a mixed or blending liquid.
  • a density measuring device is provided for determining the density of the blending liquid at a location downstream of the mixing arrangement, and a control arrangement is provided for controlling the first and the second liquid supply arrangements in response to the density measuring device.
  • FIG. 1 is a schematic diagram of a blending system in a general application according to one embodiment of the invention
  • Fig. 2 is a schematic diagram of a blending system used to produce a product such as a soft drink that is formed of blended water and syrup according to another embodiment of the invention
  • Fig. 3 is a schematic diagram of a tank-free blending system to produce a product such as a soft drink that is formed of blended water and syrup according to another embodiment of the invention.
  • Fig. 4 illustrates an alternative embodiment of a liquid mixing or blending system in accordance with the present invention.
  • Fig. 1 provides a general illustration of the present invention, which can be used in a variety of applications.
  • a first liquid component is supplied from a source A, which may be a tank or reservoir (or alternatively may simply be a pipe that supplies the liquid component), and a second liquid component is supplied from a source B, which again may be a tank or reservoir (or alternatively may simply be a pipe that supplies the liquid component).
  • the two liquid components are destined to be mixed or blended together to form a final, blended product.
  • the first liquid component is supplied through a line 12a to a metering pump 14a, which is driven by a motor 16a.
  • the second liquid component is supplied through a line 12b to a metering pump 14b, which is driven by a motor 16b.
  • the metering pumps 14a, 14b function to accurately dispense desired quantities of the first and second liquid components according to a predetermined ratio.
  • the metering pumps 14a, 14b may be progressive cavity metering pumps, such as are available from any number of known manufacturers.
  • the motors 16a, 16b that drive respective metering pumps 14a, 14b are preferably variable speed motors, e.g. servo-type motors.
  • motors of this type can be carefully controlled so that the speed of operation can be constantly and almost instantaneously changed as desired, in response to input signals provided by a motor controller.
  • the operation of the metering pumps 14a, 14b can likewise be carefully controlled so that the output of each pump can be constantly and almost instantaneously varied as desired.
  • Metering pump 14a discharges to a line 18a
  • metering pump 14b discharges to a line 18b.
  • the lines 18a and 18b connect together, so that the two liquid components are supplied to a line 20.
  • a mixer 22 is in line 20, and functions to mix or blend the two liquid components together as the liquid components are moved through line 20.
  • the mixed or blended liquid then passes through a mass flow meter 24 that is in line 20 downstream of mixer 22.
  • the mass flow meter 24 may be a coriolis-type flow meter.
  • certain characteristics or parameters of the mixed or blended liquid can be measured by the mass flow meter 24 at a point immediately downstream of the location at which the liquid components are mixed together, and then compared to predetermined characteristics or parameters.
  • a controller responsive to inputs from the mass flow meter 24 can adjust the speed of operation of motor 16a and/or motor 16b to alter the supply of one or both of the liquid components from pump 14a and/or pump 14b, to quickly bring the measured characteristics or parameters of the blended liquid within acceptable ranges.
  • the coriolis-type mass flow meter 24 functions to measure the volumetric flow, mass flow and density of the mixed or blended liquid.
  • the flow volume is known from the output of the pumps 14a and 14b, and the density of the mixed or blended liquid can be determined using the mass flow meter data.
  • Many typical applications require that the liquid density fall within an acceptable range, and the present invention allows precise and nearly instantaneous control of this important parameter.
  • Fig. 2 illustrates a representative application of the system shown in Fig. 1. hi this application, the blending system is used to produce a product such as a soft drink that is formed of blended water and syrup. It should be understood that the application illustrated in Fig. 2 is representative of any number of different applications in which the system of Fig. 1 may be used to blend two or more liquids together to provide a blended liquid having certain predetermined characteristics..
  • the first liquid A is in the form of syrup that may be supplied from a syrup tank ST to pump 14a.
  • the second liquid B is in the form of water that may be supplied from a water tank WT to pump 14b.
  • the syrup and water streams are supplied through lines 18a and 18b, respectively, to line 20 and to mixer 22, and then to mass flow meter 24.
  • the flow meter 24 functions to measure the volumetric flow, mass flow and density of the mixed syrup and water, to ensure that the ratio of syrup to water in the mixed stream is within an acceptable range. In this manner, adjustments can quickly be made in the flow rate of either the syrup or the water in the event there are variations in the density (concentration) of the syrup, so that the density (concentration) of the final product is relatively constant.
  • carbon dioxide may be injected into the mixed syrup and water at a location downstream of flow meter 24 using a conventional carbon dioxide supply system shown generally at 26.
  • the carbonated liquid is then passed through a conventional chiller 28 and is supplied to a pressurized product holding tank 30.
  • the carbonated liquid is then supplied to a filler 32 which functions to dispense the liquid into individual containers.
  • An auxiliary booster pump and valve system 34 may be located between the holding tank 30 and the filler 32 in order to maintain a desired degree of pressure on the carbonated liquid during the filling operation.
  • Fig. 3 illustrates a system similar to that shown in Fig. 2, which may be used for production of a mixed or blended liquid such as a carbonated beverage.
  • the blending system is used to blend a product such as a soft drink using a first liquid A in the form of syrup that may be supplied from a syrup tank ST to pump 14a, and a second liquid B in the form of water that may be supplied from a water tank WT to pump 14b.
  • the syrup and water streams are supplied through lines 18a and 18b, respectively, to line 20 and to mixer 22, and then to mass flow meter 24.
  • the flow meter 24 functions to measure the volumetric flow, mass flow and density of the mixed syrup and water, to ensure that the ratio of syrup to water in the mixed stream is within an acceptable range. Again, adjustments can quickly be made in the flow rate of either the syrup or the water in the event there are variations in the density (concentration) of the syrup, so that the density (concentration) of the final product is relatively constant.
  • carbon dioxide may be injected into the mixed syrup and water at a location downstream of flow meter 24 using the carbon dioxide supply system 26. The carbonated liquid is then passed through a conventional chiller 28. m the system of Fig. 3, however, the product holding tank 30 of Fig.
  • a first liquid component is supplied from source A, which may be a tank or reservoir (or alternatively may simply be a pipe that supplies the liquid component), and a second liquid component is supplied from source B, which again may be a tank or reservoir (or alternatively may simply be a pipe that supplies the liquid component).
  • source A which may be a tank or reservoir (or alternatively may simply be a pipe that supplies the liquid component)
  • B which again may be a tank or reservoir (or alternatively may simply be a pipe that supplies the liquid component).
  • the two liquid components are destined to be mixed or blended together to form a final, blended product.
  • the first liquid component is supplied through a line 12a to a pump 40a, which may be any satisfactory conventional pump such as a centrifugal pump, positive displacement pump, etc.
  • a flow meter 42a is located downstream of pump 40a, and a flow meter 42b is located downstream of pump 40b.
  • Flow meters 42a and 42b function to accurately measure the output of respective pumps 40a, 40b at a location immediately adjacent the outlet of each pump. In this manner, the flow rates of liquids A and B can be carefully controlled before the liquids A and B are mixed together.
  • the lines 18a and 18b connect together, so that the two liquid components A and B are supplied to line 20.
  • the mixer 22 functions to mix or blend the two liquid components together as the liquid components are moved through line 20.
  • the mixed or blended liquid then passes through the mass flow meter 24 downstream of mixer 22.
  • the characteristics or parameters of the mixed or blended liquid are measured by the mass flow meter 24 immediately downstream of the location at which the liquid components are mixed together, and then compared to predetermined characteristics or parameters.
  • a controller responsive to inputs from the mass flow meter 24 can adjust the supply of one or both of the liquid components, to quickly bring the measured characteristics or parameters of the liquid within acceptable ranges.
  • the coriolis-type flow meter 24 as shown and described is a mass flow meter, which determines volumetric flow, mass flow as well as density. It is also contemplated that the present invention may be carried out using separate meters that measure flow and density. While the present invention has been shown and described in connection with the measurement of mass flow and density for compliance with a desired ratio, it is also contemplated that any other parameter of the mixed product can be measured for compliance and that the supply of the liquid components can then be adjusted according to the measured parameter. For example, it is contemplated that parameters such as the color, pH, light absorption, light reflectivity, etc. of the mixed product may be measured and that the supply streams can be adjusted according to such measurements.
  • the controlled liquid blending system of the present invention provides a number of advantages over prior art systems.
  • the present invention contemplates use of a single coriolis flow meter which measures the volumetric flow, mass flow and density of the blended liquid as opposed to measuring the mass flow of the individual liquid components or streams.
  • the present invention provides accurate measurement of the concentration of the blended product itself at a location immediately downstream of the point at which the liquid components or streams are mixed.
  • the present invention also enables the mixed product to be pressurized in line, which can result in elimination of the pressurized product holding tank utilized in the prior art. Furthermore, the present invention enables the individual liquid components, and therefore the blended liquid stream, to be processed at a variable flow rate, rather than the full production flow rate provided by prior art systems. Importantly, the present invention also allows the production of a multi-component liquid product without the use of a holding or mixing tank.
  • the components of the final product are accurately metered and are mixed immediately downstream of the location at which the final component is introduced, and are then immediately measured to ensure the product is within specifications. If adjustments in the supply streams are required, the adjustments are made immediately and there is little product that is produced before the product is brought back into compliance with specifications.
  • the system of the present invention is not limited to use in connection with blending of two liquid streams as shown and described. In fact, the system of the present invention may be used in connection with blending of any number of liquid streams, and the measurement of characteristics of the blended streams downstream of the location at which the individual component streams are mixed may be used to provide accurate and quick adjustments in the flow of the individual streams.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Accessories For Mixers (AREA)

Abstract

Système de mélange, comprenant un premier arrangement de fourniture de liquide pour fournir un premier composant liquide, un deuxième arrangement de fourniture de liquide pour fournir un deuxième composant liquide, un arrangement de mélange pour mélanger les premier et deuxième composants liquides pour former un liquide mélangé, et un dispositif de mesure de débit massique pour déterminer le débit massique du liquide mélangé en un endroit situé en aval de l'arrangement de mélange. Le système de mélange comprend en outre un arrangement de commande pour commander les premier et deuxième arrangements de fourniture de liquide en réponse au dispositif de mesure de débit massique. Le dispositif de mesure de débit massique peut aussi mesurer la densité et/ou l'écoulement volumétrique du liquide mélangé. Le système de mélange peut aussi être conçu sans réservoir de stockage.
PCT/US2009/052824 2008-08-05 2009-08-05 Système de mélange WO2010017280A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8636008P 2008-08-05 2008-08-05
US61/086,360 2008-08-05

Publications (1)

Publication Number Publication Date
WO2010017280A1 true WO2010017280A1 (fr) 2010-02-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/052824 WO2010017280A1 (fr) 2008-08-05 2009-08-05 Système de mélange

Country Status (2)

Country Link
US (1) US20100031825A1 (fr)
WO (1) WO2010017280A1 (fr)

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